Made for everyday wear, vascular conditions, neuropathy, cold feet or diabetes; these socks bring comfort to tired legs and feet within minutes of wearing. Bamboo charcoal and Germanium fibers increase blood flow making these socks ideal for anyone experiencing discomfort due to poor circulation. Antimicrobial. Machine wash. 78% Germanium & Bamboo Charcoal fibers, 22% Lycra + Spandex. Specify: SM(Women's 4-7), MD(Women's 8-10 1/2, Men's 7-9 1/2) or LG(Men's 10-13 1/2).